마이크로 터보제트 엔진의 터보팬 파생개발 연구

Abstract

A study to modify and develop a turbofan engine using a micro turboprop engine has been conducted. The turbofan engine has been designed by adding a fan blade module as well as other required accessories to the existing turboprop engine. CFD and FEM methods were used for numerical analyses of the additional fan module to assess its aerodynamic performance and structural stability. Components of the fan module were fabricated with consideration for manufacture and assembly, and a test rig was also designed and built to measure the turbofan engine performance. The performances of the turbofan engine were measured and compared to an existing micro-turbojet engine. The performance tests were conducted in two phases: In the first phase, the robustness of the designed turbofan and test rig were investigated and in the second phase, the maximum power test has been conducted to measure performance variables such as engine thrust, engine exhaust temperature(EGT) and fuel flow rate according to the engine RPM. The test results indicated that the turbofan engine SFC was reduced by 40∼50% of the existing turbojet engine, demonstrating the successful implementation of turbofan characteristics.